May 8, 2018—KB4103712 (Security-only update)

Improvements and fixes

This security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

Addresses an issue that may cause a memory leak on SMB servers after installing KB4056897 or any other recent monthly update. This leak may occur when the requested path traverses a symbolic link, a mount point, or a directory junction and the registry key is set to 1: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanManServer\Parameters\EnableEcp